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B→χcJK decays revisited


Beneke, M; Vernazza, L (2009). B→χcJK decays revisited. Nuclear Physics. Section B, 811(1-2):155-181.

Abstract

We demonstrate that exclusive B decays to P-wave charmonium factorize in the non-relativistic limit provided that colour-octet contributions are taken into account, and estimate the branching fractions. Although there are very large uncertainties, we find reasonable parameter choices, where the main features of the data – large corrections to (naive) factorization and suppression of the χc2 and hc final states – are reproduced though the suppression of χc2 is not as strong as seen in the data. Our results also provide an example, where an endpoint divergence in hard spectator-scattering factorizes and is absorbed into colour-octet operator matrix elements.

Abstract

We demonstrate that exclusive B decays to P-wave charmonium factorize in the non-relativistic limit provided that colour-octet contributions are taken into account, and estimate the branching fractions. Although there are very large uncertainties, we find reasonable parameter choices, where the main features of the data – large corrections to (naive) factorization and suppression of the χc2 and hc final states – are reproduced though the suppression of χc2 is not as strong as seen in the data. Our results also provide an example, where an endpoint divergence in hard spectator-scattering factorizes and is absorbed into colour-octet operator matrix elements.

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Additional indexing

Other titles:B -> chi_cJ K decays revisited
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:2009
Deposited On:22 Feb 2010 12:06
Last Modified:05 Apr 2016 13:56
Publisher:Elsevier
ISSN:0550-3213
Publisher DOI:https://doi.org/10.1016/j.nuclphysb.2008.11.025
Related URLs:http://arxiv.org/abs/0810.3575

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